hey I have a marine heat pump system that runs on r 22. the problem is the thermostat is old, and I want to put a new digital thermostat there. the problem is the control voltage on the boat is 120 volts not 24 volts. but the compressor and air handlers are120 volts. can't I add a transformer and change out the relay and make this thing work?
They have a line voltage one for heating. Have never seen one for AC as there are no 110 volt AC tstats that I have ever seen. You can do it with a transformer and relay but may run into liability issues if something goes wrong.
"Cut it twice and it is still too short".
could add this relay http://www.bestbuyheatingandaircondi..._Code=REL90123 might want to add a time delay with it being 120V along with that TR 40VA 115/24.if you go with the 24V change ton of setback stats are there with wake/leave/return/sleep..if you just want 2 setbacks might hold off...120Vs are availible....